Phase 1 stub — country article (depth 4)

hypertension-remedes-africains-traditionnels

Article rendering layer coming in Phase 3 (will reuse the existing article component, parameterized by country + sub_hub).

{
  "route": "c/[country]/[pillar]/[sub_hub]/[slug]",
  "public_url": "/ci/hypertension/remedes-hypertension/hypertension-remedes-africains-traditionnels",
  "country_code": "ci",
  "pillar_id": "hypertension",
  "sub_hub": "remedes-hypertension",
  "article_slug": "hypertension-remedes-africains-traditionnels"
}